Draw large circles and measure sizable
distances with the accuracy of a divider.
Fine adjusting screw sets points accurately.
Points are removable and may be replaced
with the pencil holder.
Die-cast bodies with hardened and ground
3 (76mm) needlepoint legs.
Clamp opening for beam is 3/8 x 3/4(10 x 19mm).
Conform to government specifications
GGG-T-661b.